Aquarium Air Pump One-Way Check Valves (2-Pack, Oxygen Supply, Anti-Backflow for Fish Tanks)

Protect your air pump from water backflow with these essential One-Way Check Valves! 🫧

• 🛡️ Anti-Backflow Protection - prevents water from siphoning back into your air pump during power outages.
• 📦 2-Pack Value - includes two valves for redundancy or use across multiple tank setups.
• 🔗 Standard Tubing Fit - compatible with 4mm aquarium air line tubing used in most setups.
• 💪 Durable Construction - high-quality materials maintain reliable one-directional airflow long-term.
• 🔧 Easy Inline Install - simply cut your airline and insert the valve — no tools or special fittings needed.